We discussed
unreasonable fears
here. There may be some overlap (I am unreasonably scared of being impaled or stabbed through the throat or cheek).
I am also occasionally afraid of mirrors or reflective surfaces. Nothing to do with my appearance - I just find them creepy. The films and books that distress me the most are the ones where things appear in mirrors or reflected in the windows of dark rooms.
Right here, in a well lit office, I have physically shuddered just typing this.